Water heating attachment for oil stoves



Nov. 19, 1935. E, KOEHN 2,021,556

WATER HEATING ATTACHMENT FOR OIL STOVES Filed Feb. 21, 1935 Patented Nov. 19, 1935 TENT Fi'iQE WATER HEATING ATTACHMENT Fillet OIL STOVES Edward Koehn, Key West, Fla.

Application February 21, 1935, Serial No. 7,627

1 Claim.

This invention relates to water heating attachments particularly for oil or gas stoves and relates particularly to an attachment of this char- 7 acter having a coil of pipe disposed over or adjacent to the burner of the stove.

The general object of this invention is to provide a water heater of an extremely cheap and simple character but which has been found thoroughly eifective in actual practice and which when in place is not conspicuous.

A further object is to provide means for detaining the freshly heated water immediately adjacent t e outlet pipe, said means, however, permitting the water as it is heated to be distributed through the tank, said means further preventing any blowing of the water and steam up to the tank cover.

Other objects and advantages will appear in the course of the following description.

My invention is illustrated in the accompanying drawing wherein:

Fig. l is a side elevation of my attachment, the oil stove being shown in dotted lines.

Fig. 2 is a top plan View of my attachment, the oil stove being shown in dotted lines and the reservoir being in section.

Fig. 3 is a fragmentary section on the line 3-3 of Fig. 1.

Referring to the drawing, A designates the top of an oil stove of any usual or suitable construction, B one of the lateral guards thereof and C the burner. My attachment comprises a tank is which is vertically elongated and has a length equal to the width of the back guard B of the stove, this tank being provided at its upper end with the hinged cover H which, as illustrated, is of such width that when it is turned down over the tank iii it extends outward over the guard B and constitutes a shelf. Extending from the bottom of the tank is the outlet pipe i2 which extends forward ben ath the top A of the stove and then laterally, and is provided with the tap or faucet E3. The pipe l2 is engaged with the bottom of the tank it in any suitable or usual manner, as illustrated in Fig. 3.

The means for heating the water consists of one or more h ating pipes and corresponding coils. Two of these heating pipes and coils are shown but more may be provided if necessary. Each heating pipe has an inlet portion is extending downward from the bottom of the tank, then extending upward and outward, as at l5, then extending over the burner and being bent to provide a coil it, the inlet end of the coil being lower than the outlet end, as shown in Fig.

1. From the coil it the pipe is extended, as at I l, to a point below the tank but on a level above the portion it}, then extends upward into the tank, as shown in Fig. 3 at iii. The portion i8 is connected to the bottom of the tank by nipples and couplings E9 or otherwise connected as desired.

It will be seen that the water from the tank will pass downward through the pipe it and then upward along the portion 95 to the entrance end 10 of the coil i 5. Water will then pass around this coil and pass back through the portions IT and it into the tank. The outlet ends of the pipe coils are disposed adjacent to the hot water outlet 22.

A baffle plate 2B is disposed on the bottom of the tank, this baiile plate having a width nearly equal to the width of the tank from front to rear, as shown in Fig. 2, and being without side walls. The top wall of this ballle plate it extends downward and laterally from the middle thereof, then sharply downward, as at 2 i, the ends of the plate engaging against the bottom of the tank W. This baiile is preferably provided with a handle 22 and with a centering pin 23 which extends 25 downward from the apex of the baflie and extends into the upper end of the pipe l2. This permits the baffle to be lifted. sli htly by the entrance of hot water or by any boiling or bubbling which may occur but prevents its getting out of place. It will be seen that the hot water entering through the pipes it is held or detained in proximity to the outlet pipe 52 so that if the tap it is opened the hottest water will be immediately discharged. The baille 28, however, permits the hot water passing from the pipes 58 to pass around the side edges of the bafile and to rise up through the column of colder water in the tank Attention is particularly called to the shape of the coil it. With this arrangement as soon as the heat from the burner strikes the coil it water starts to circulate, the water being drawn from the bottom portion of the tank and discharged back to the same level at the bottom of the same tank. The water enters the low end of the coil and then the water starts upward in the slanting coil and is discharged from the high end of the coil. In actual practice it has been found that the water circulates rapidly and as soon as the amount of water that is in the tank has passed through the heating pipe or pipes all of the water will be hot. One of the advantages of my structure is that it is silent in operation. In actual test, I have found that one burner of an ordinary oil stove will heat three gallons of water to 120 in about twenty minutes. Of course, if two coils are used, the water Will be heated in less time. The baffle 20 keeps the hot water from passing immediately back to the pipes I4 and thus secures a more even distribution of the hot water throughout the tank. Furthermore, if the water should get low in the tank then this bafile 2E3- prevents the hot water and steam from blowing up to the tank cover.

It will be noted from Fig. 3 that the end of pipe 12 and the nut engaging this end is extended upward within the tank above the bottom thereof approximately one-half inch so that there will always be Water left on the bottom of the tank. This is suificient Water to keep the tube supplied at all times.

It will be seen that my device is very inconspicuous inasmuch as the tank itself is mounted back of the rear wall of the guard B and that from the front of the stove the only part that shows is the pipe l2 with the tap or faucet.

It is to be understood that the bafile 23 has about A of an inch clearance at its ends from the walls of the tank and that when the hot Water enters under this baille from the pipe l8, it strikes the baffle and then it whirls toward the middle portion of the bafile, then it escapes between the edge of the bafile and the tank walls, then when the tap is opened the hot water runs to the outlet pipe [2 and the water enters from pipe I8 or around the baffle from the body of the tank to re-place the hot Water. By causing the water to enter under the bafiie on each side, there is no rush of cold water directly to the outlet pipe I2 when the faucet is opened.

What is claimed is:-

A water heater for oil stoves, comprising a vertically disposed tank, a pair of coils, each coil having an inlet pipe extending into the bottom of the tank and an outlet pipe extending into the bottom of the tank toward the center thereof, the inlet pipes of the coils being disposed adjacent the sides of the tank, the outlet pipes from the coils being disposed relatively adjacent the tank outlet pipe, and a baflle extending over the tank outlet pipe and extending downward and engaging the bottom of the water tank between the outlet and the inlet pipes, the baffle being so constructed and arranged as to provide a. passage for water from the space defined by the bafile into the upper portion of the tank.

EDWARD KOEI-IN. 

